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<html>
<title>Animation Worklet should update calculated timing whenever localTime changes</title>
<link rel="help" href="https://drafts.css-houdini.org/css-animationworklet/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="common.js"></script>
<div id="box"></div>
<script id="get_computed_timing_animator" type="text/worklet">
registerAnimator('get_computed_timing', class {
constructor(options, state) {
this.step = state ? state.step : 0;
}
state() {
return {
step: 0
}
}
animate(currentTime, effect){
if (this.step === 0){
// check calculated timing values before ever setting effect.localTime
effect.localTime = (effect.getComputedTiming().currentIteration * 100) + (effect.getComputedTiming().progress * 100);
this.step = 1;
}
else if (this.step === 1){
// set effect.localTime, this should be the first time calculated timing values are computed
effect.localTime = 420; // 20% of the way through the last iteration
// using the calculated timing of effect, set effect.localTime.
effect.localTime = (effect.getComputedTiming().currentIteration * 100) + (effect.getComputedTiming().progress * 100);
this.step = 2;
}
else if (this.step === 2){
// set effect.localTime to null
effect.localTime = null;
effect.localTime = (effect.getComputedTiming().currentIteration * 100) + (effect.getComputedTiming().progress * 100);
this.step = 3;
}
else if (this.step === 3){
// Check to make sure we can go from null to a valid localTime and that calculated timing values are computed
effect.localTime = 350; // 50% of the way through second iteration
effect.localTime = (effect.getComputedTiming().currentIteration * 100) + (effect.getComputedTiming().progress * 100);
this.step = 4;
}
}
});
</script>
<script>
promise_test(async t => {
await runInAnimationWorklet(document.getElementById('get_computed_timing_animator').textContent);
const box = document.getElementById("box");
const effect = new KeyframeEffect(
box,
[
{ opacity: 0 },
{ opacity: 1 }
], {
delay: 200,
duration: 100,
iterations: 3
}
);
const animation = new WorkletAnimation('get_computed_timing', effect);
animation.play();
// check calculated timing values before ever setting effect.localTime
await waitForAnimationFrameWithCondition(() => {return approxEquals(effect.getComputedTiming().localTime, 0)});
// Check to make sure initial values can be set for computed timing
await waitForAnimationFrameWithCondition(() => {return approxEquals(effect.getComputedTiming().localTime, 220)});
// Make sure setting effect.localTime to null causes calculated timing values to be computed
await waitForAnimationFrameWithCondition(() => {return approxEquals(effect.getComputedTiming().localTime, 0)});
// Make sure we can go from null to a valid localTime and that calculated timing values are computed
await waitForAnimationFrameWithCondition(() => {return approxEquals(effect.getComputedTiming().localTime, 150)});
// Passes if it doesn't timeout
animation.cancel();
}, "WorkletAnimation effect should recompute its calculated timing if its local time changes");
</script>
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